package com.itheima.interceptor;

import com.alibaba.fastjson.JSONObject;
import com.itheima.pojo.Result;
import com.itheima.utils.JwtUtils;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

@Slf4j
@Component
public class LoginCheckInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest req, HttpServletResponse resp, Object handler) throws Exception {

        String url=req.getRequestURI().toString();
        log.info("url:{}",url);

        if(url.contains("login")){
            log.info("登录操作，放行");
            return true;
        }

        String jwt=req.getHeader("token");
        if(jwt==null){
            log.info("请求头token为空，返回未登录的信息");
            Result error=Result.error("NOT_LOGIN");

            String notLogin= JSONObject.toJSONString(error);
            resp.getWriter().write(notLogin);
            return false;
        }

        try {
            JwtUtils.parseJWT(jwt);
        } catch (Exception e) {
            e.printStackTrace();
            log.info("解析令牌失败，返回未登录错误信息");
            Result error=Result.error("NOT_LOGIN");

            String notLogin=JSONObject.toJSONString(error);
            resp.getWriter().write(notLogin);
            return false;
        }
        log.info("令牌合法，放行");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("postHandle...");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("afterCompletion...");
    }
}
